'Fog' lights where originally designed to be mounted low to illuminate the ground under the fog line.
Factory provided 'driving' lights don't usually do much, if you turn your 'fogs' on and off on a dark road, you will notice that they kind of illuminate the sides, right in front of the car.
You can switch the bulbs, but it won't do much, except looks better. Tilting them won't do much either, unless daKiNeP5 has gotten positve results.
Even if you upgrade the entire thing, low mounted drving lights are more for throwing light to the sides. For Any good forward illumination you need to mount new lamps above the bumper line.